Very little validation evidence exists for the sleep-tracking features of the vast majority of commercial fitness trackers. Specifically, we know very little about how closely the sleep data provided by commercial fitness trackers are concordant with sleep data provided by research-based devices. This study will provide important information about the equivalence of sleep data obtained from commercial fitness trackers and research-based devices. If found to be equivalent to research-based devices, commercial fitness trackers could be advocated for use in research due to their lower cost and their acceptability among adults. Conversely, findings of non-equivalence between these devices is important to know, since some researchers are already using commercial devices to assess sleep in their studies.
The overall purpose of this study is to examine the level of concordance between the sleep-tracking data provided by 7 commercial fitness trackers (Fitbit Alta, Garmin Vivosmart HR, Jawbone UP3, Misfit Shine, Polar A360, Samsung Gear Fit 2, Xiaomi Mi Pulse) and a research-based sleep device (Philips Actiwatch Spectrum).